It began when the Audeze team met the legendary electronics designer
Bascom King in his design lab. Bascom has designed acclaimed amplifiers
for Infinity, Marantz, Constellation Audio, PS Audio and others. He
demoed a prototype headphone amplifier that so impressed everyone that
they signed Bascom on the spot to develop the new headphone amplifier
exclusively for Audeze.

The Kingā²s circuitry is very different
from the typical complementary output topology; it uses the same
polarity N-channel MOSFET outputs as these are more alike and
complementary than N- and P-channel MOSFETs. Just before the output
stage is a two-stage differential amplifier using a dual-triode tube for
the input stage followed by a P-channel MOSFET differential driver
stage. The driver stage supplies complementary drive to the N-channel
output devices. Overall negative feedback is taken back to the input
stage to include the input triode in the feedback loop. The circuit is
DC-coupled from input to output and a servo control circuit keeps the
output DC offset to within millivolts of zero. The overall symmetry of
the circuitry eliminates most even-order harmonic distortion. The result
is a low impedance, low distortion, wide frequency response output with
immense musical transparency, a real emotional experience.